1320143209 has 16 divisors (see below), whose sum is σ = 1661285376. Its totient is φ = 1019062800.

The previous prime is 1320143207. The next prime is 1320143263. The reversal of 1320143209 is 9023410231.

It is not a de Polignac number, because 1320143209 - 2¹ = 1320143207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320143203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71877 + ... + 88354.

It is an arithmetic number, because the mean of its divisors is an integer number (103830336).

Almost surely, 2^1320143209 is an apocalyptic number.

It is an amenable number.

1320143209 is a deficient number, since it is larger than the sum of its proper divisors (341142167).

1320143209 is a wasteful number, since it uses less digits than its factorization.

1320143209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160356.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1320143209 is about 36333.7750447156. The cubic root of 1320143209 is about 1097.0009794389. Note that the first 3 decimals are identical.

The spelling of 1320143209 in words is "one billion, three hundred twenty million, one hundred forty-three thousand, two hundred nine".